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Issue 26539010: Revert "AllocationSites for all literals" (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 7 years, 2 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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858 #define DECL_BOOLEAN_ACCESSORS(name) \ 858 #define DECL_BOOLEAN_ACCESSORS(name) \
859 inline bool name(); \ 859 inline bool name(); \
860 inline void set_##name(bool value); \ 860 inline void set_##name(bool value); \
861 861
862 862
863 #define DECL_ACCESSORS(name, type) \ 863 #define DECL_ACCESSORS(name, type) \
864 inline type* name(); \ 864 inline type* name(); \
865 inline void set_##name(type* value, \ 865 inline void set_##name(type* value, \
866 WriteBarrierMode mode = UPDATE_WRITE_BARRIER); \ 866 WriteBarrierMode mode = UPDATE_WRITE_BARRIER); \
867 867
868
868 class AccessorPair; 869 class AccessorPair;
869 class AllocationSite;
870 class AllocationSiteContext;
871 class DictionaryElementsAccessor; 870 class DictionaryElementsAccessor;
872 class ElementsAccessor; 871 class ElementsAccessor;
873 class Failure; 872 class Failure;
874 class FixedArrayBase; 873 class FixedArrayBase;
875 class ObjectVisitor; 874 class ObjectVisitor;
876 class StringStream; 875 class StringStream;
877 class Type; 876 class Type;
878 877
879 struct ValueInfo : public Malloced { 878 struct ValueInfo : public Malloced {
880 ValueInfo() : type(FIRST_TYPE), ptr(NULL), str(NULL), number(0) { } 879 ValueInfo() : type(FIRST_TYPE), ptr(NULL), str(NULL), number(0) { }
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2538 // Disalow further properties to be added to the object. 2537 // Disalow further properties to be added to the object.
2539 static Handle<Object> PreventExtensions(Handle<JSObject> object); 2538 static Handle<Object> PreventExtensions(Handle<JSObject> object);
2540 2539
2541 // ES5 Object.freeze 2540 // ES5 Object.freeze
2542 static Handle<Object> Freeze(Handle<JSObject> object); 2541 static Handle<Object> Freeze(Handle<JSObject> object);
2543 2542
2544 // Called the first time an object is observed with ES7 Object.observe. 2543 // Called the first time an object is observed with ES7 Object.observe.
2545 MUST_USE_RESULT MaybeObject* SetObserved(Isolate* isolate); 2544 MUST_USE_RESULT MaybeObject* SetObserved(Isolate* isolate);
2546 2545
2547 // Copy object. 2546 // Copy object.
2548 static Handle<JSObject> Copy(Handle<JSObject> object,
2549 Handle<AllocationSite> site);
2550 static Handle<JSObject> Copy(Handle<JSObject> object); 2547 static Handle<JSObject> Copy(Handle<JSObject> object);
2551 static Handle<JSObject> DeepCopy(Handle<JSObject> object, 2548 static Handle<JSObject> DeepCopy(Handle<JSObject> object);
2552 AllocationSiteContext* site_context);
2553 static Handle<JSObject> DeepWalk(Handle<JSObject> object,
2554 AllocationSiteContext* site_context);
2555 2549
2556 // Casting. 2550 // Casting.
2557 static inline JSObject* cast(Object* obj); 2551 static inline JSObject* cast(Object* obj);
2558 2552
2559 // Dispatched behavior. 2553 // Dispatched behavior.
2560 void JSObjectShortPrint(StringStream* accumulator); 2554 void JSObjectShortPrint(StringStream* accumulator);
2561 DECLARE_PRINTER(JSObject) 2555 DECLARE_PRINTER(JSObject)
2562 DECLARE_VERIFIER(JSObject) 2556 DECLARE_VERIFIER(JSObject)
2563 #ifdef OBJECT_PRINT 2557 #ifdef OBJECT_PRINT
2564 void PrintProperties(FILE* out = stdout); 2558 void PrintProperties(FILE* out = stdout);
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8004 DECL_ACCESSORS(transition_info, Object) 7998 DECL_ACCESSORS(transition_info, Object)
8005 // nested_site threads a list of sites that represent nested literals 7999 // nested_site threads a list of sites that represent nested literals
8006 // walked in a particular order. So [[1, 2], 1, 2] will have one 8000 // walked in a particular order. So [[1, 2], 1, 2] will have one
8007 // nested_site, but [[1, 2], 3, [4]] will have a list of two. 8001 // nested_site, but [[1, 2], 3, [4]] will have a list of two.
8008 DECL_ACCESSORS(nested_site, Object) 8002 DECL_ACCESSORS(nested_site, Object)
8009 DECL_ACCESSORS(dependent_code, DependentCode) 8003 DECL_ACCESSORS(dependent_code, DependentCode)
8010 DECL_ACCESSORS(weak_next, Object) 8004 DECL_ACCESSORS(weak_next, Object)
8011 8005
8012 inline void Initialize(); 8006 inline void Initialize();
8013 8007
8014 bool HasNestedSites() {
8015 return nested_site()->IsAllocationSite();
8016 }
8017
8018 // This method is expensive, it should only be called for reporting.
8019 bool IsNestedSite();
8020
8021 ElementsKind GetElementsKind() { 8008 ElementsKind GetElementsKind() {
8022 ASSERT(!SitePointsToLiteral()); 8009 ASSERT(!IsLiteralSite());
8023 return static_cast<ElementsKind>(Smi::cast(transition_info())->value()); 8010 return static_cast<ElementsKind>(Smi::cast(transition_info())->value());
8024 } 8011 }
8025 8012
8026 void SetElementsKind(ElementsKind kind) { 8013 void SetElementsKind(ElementsKind kind) {
8027 set_transition_info(Smi::FromInt(static_cast<int>(kind))); 8014 set_transition_info(Smi::FromInt(static_cast<int>(kind)));
8028 } 8015 }
8029 8016
8030 bool SitePointsToLiteral() { 8017 bool IsLiteralSite() {
8031 // If transition_info is a smi, then it represents an ElementsKind 8018 // If transition_info is a smi, then it represents an ElementsKind
8032 // for a constructed array. Otherwise, it must be a boilerplate 8019 // for a constructed array. Otherwise, it must be a boilerplate
8033 // for an object or array literal. 8020 // for an array literal
8034 return transition_info()->IsJSArray() || transition_info()->IsJSObject(); 8021 return transition_info()->IsJSArray();
8035 } 8022 }
8036 8023
8037 DECLARE_PRINTER(AllocationSite) 8024 DECLARE_PRINTER(AllocationSite)
8038 DECLARE_VERIFIER(AllocationSite) 8025 DECLARE_VERIFIER(AllocationSite)
8039 8026
8040 static inline AllocationSite* cast(Object* obj); 8027 static inline AllocationSite* cast(Object* obj);
8041 static inline AllocationSiteMode GetMode( 8028 static inline AllocationSiteMode GetMode(
8042 ElementsKind boilerplate_elements_kind); 8029 ElementsKind boilerplate_elements_kind);
8043 static inline AllocationSiteMode GetMode(ElementsKind from, ElementsKind to); 8030 static inline AllocationSiteMode GetMode(ElementsKind from, ElementsKind to);
8044 static inline bool CanTrack(InstanceType type); 8031 static inline bool CanTrack(InstanceType type);
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10420 } else { 10407 } else {
10421 value &= ~(1 << bit_position); 10408 value &= ~(1 << bit_position);
10422 } 10409 }
10423 return value; 10410 return value;
10424 } 10411 }
10425 }; 10412 };
10426 10413
10427 } } // namespace v8::internal 10414 } } // namespace v8::internal
10428 10415
10429 #endif // V8_OBJECTS_H_ 10416 #endif // V8_OBJECTS_H_
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